2015 Ford Escape Spark Plug Guide

Quick Reference: 2015 Ford Escape Spark Plug Specifications

Note: Always verify part numbers and specifications with your vehicle's owner's manual or a certified parts supplier before beginning work. Aftermarket equivalents are provided for reference; other brands may be available.

Why the Right Spark Plug Matters

Choosing the correct spark plug is crucial for engine performance, fuel economy, and longevity. It's not just about finding a plug that fits; factors like heat range and electrode material are critical.

• Heat Range: This determines how quickly the plug transfers heat from the combustion chamber to the cylinder head. A plug that is too "hot" (doesn't transfer heat well) can lead to pre-ignition and engine damage. A plug that is too "cold" can accumulate deposits and foul, causing misfires. Direct-injected, turbocharged engines like the 1.6L and 2.0L EcoBoost require a colder plug to handle the intense cylinder pressures and temperatures.
• Electrode Material: The 2015 Escape engines use long-life Iridium-tipped spark plugs from the factory. Iridium is an extremely hard, precious metal that resists wear far better than platinum or traditional copper. While copper plugs offer excellent conductivity, they wear out quickly (typically every 30,000 miles). Iridium plugs maintain a precise gap for 100,000 miles or more, ensuring a consistent, strong spark for optimal combustion.

How to Gap a Spark Plug

Even though most modern iridium plugs come pre-gapped, it is essential to verify the gap before installation. Shipping and handling can easily close the delicate electrode.

1. Use the Right Tool: A "feeler gauge" or a dedicated spark plug wire/ramp gauge is the best tool. Avoid the old "coin-style" gappers, as they can put too much pressure on the fine-wire iridium tip and break it.
2. Check the Gap: Slide the correct wire or feeler from your gauge into the gap between the center and ground electrodes. It should slide through with slight drag. If it's too loose or won't fit, it needs adjustment.
3. Adjust Carefully: To adjust, gently bend the ground electrode (the L-shaped piece over the top) only. Use the slot or fork on your gapping tool to lightly pry it open or tap it gently on a hard surface to close the gap. Never touch or put pressure on the center electrode or its iridium tip.

Replacement Procedure Tips for 2015 Escape

The 2015 Escape uses a modern coil-on-plug (COP) ignition system, which eliminates the need for a distributor and spark plug wires. Each spark plug has its own ignition coil sitting directly on top of it.

• Coil-on-Plug Removal: After removing the engine cover, you will see the ignition coils. Disconnect the electrical connector from each coil, then undo the single hold-down bolt (typically 8mm). The coil can then be gently twisted and pulled straight up to remove it from the spark plug.
• The Anti-Seize Debate: Historically, technicians applied a light coat of anti-seize compound to plug threads to prevent them from seizing in the aluminum cylinder head. However, modern Motorcraft and NGK plugs feature a special trivalent plating that acts as its own anti-seize and release agent. Most manufacturers, including Ford, now recommend installing these plugs dry and clean. Applying additional anti-seize can act as a lubricant, leading you to over-torque the plug, which can damage the threads or the plug itself.
• Dielectric Grease: While you should skip the anti-seize on the threads, applying a small amount of dielectric grease to the inside of the ignition coil boot is highly recommended. This prevents the boot from sticking to the spark plug's ceramic insulator, makes future removal easier, and helps seal out moisture that could cause a misfire.
• Torque is Critical: Use a torque wrench. Over-tightening can stretch the plug shell and damage the cylinder head threads. Under-tightening can allow the plug to loosen from vibration, leading to poor heat transfer and potential damage. The torque specs are low (10-11 lb-ft), so a precise, calibrated wrench is necessary.

Known Issues

Thankfully, the 2015 Escape engines do not suffer from the infamous two-piece spark plug issue that plagued earlier Ford 3-valve modular engines (e.g., 5.4L V8). Those plugs had a tendency for the lower shell to break off inside the cylinder head, requiring a special extraction tool. The plugs used in the Escape are a conventional one-piece design, making replacement a much safer and more straightforward job.

Need your spark plugs replaced? The job requires precision, the right tools, and careful attention to detail. Find a certified local shop you can trust on Repairius.com.